<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区 -->
      <div class="avatar_box">
        <img src="../assets/avatar.jpg" alt />
      </div>
      <!-- 登录表单区域 -->
      <el-form
        ref="loginFormRef"
        :model="loginForm"
        :rules="loginFormRules"
        label-width="0px"
        class="login_form"
      >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <!-- <el-input v-model="form.name" prefix-icon="iconfont icon-user"></el-input> -->
          <el-input v-model="loginForm.username" prefix-icon="el-icon-user-solid"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <!-- <el-input v-model="form.password" prefix-icon="iconfont icon-3702mima"></el-input> -->
          <el-input v-model="loginForm.password" type="password" prefix-icon="el-icon-lock"></el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //这是登录表单的定义对象
      loginForm: {
        username: "admin",
        password: "123456"
      },
      loginFormRules: {
        //验证用户名是否合法
        username: [
          { required: true, message: "请输入用户名", trigger: "blur" },
          { min: 3, max: 10, message: "长度在 3 到 10 个字符", trigger: "blur" }
        ],
        //验证密码是否合法
        password: [
          { required: true, message: "请输入登录密码", trigger: "blur" },
          { min: 6, max: 15, message: "长度在 6 到 15 个字符", trigger: "blur" }
        ]
      }
    };
  },
  methods: {
    //点击重置按钮，重置登录表单
    resetLoginForm() {
      this.$refs.loginFormRef.resetFields();
    },
    //登录方法
    login() {
      this.$refs.loginFormRef.validate(async valid => {
        if(!valid) return;
        const {data:res} = await this.$http.post("login",this.loginForm);
        console.log(res);
        if(res.meta.status != 200) return this.$message.error('登录失败！')
        this.$message.success('登陆成功');
        //1.将登陆成功之后的token，保存在客户端的sessionStorage中
        //  1.1项目中除了登陆之外的其他API接口，必须在登陆之后才能访问
        //　１.2 token只应在当前网站打开的瞬间生效所以将token保存在sessionStorage中
        window.sessionStorage.setItem('token',res.data.token);
        //2.通过编程式导航跳转到后台主页，路由地址是/home
        this.$router.push('/home');
      });
    }
  }
};
</script>

<style lang="less" scoped>
.login_container {
  background:url(../assets/5054.jpg) no-repeat ;
  background-size: 100% 100%;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  border-radius: 5px;
  background-color: #fff;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  .avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 8px;
    box-shadow: 0 0 8px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
  .login_form {
    position: absolute;
    box-sizing: border-box;
    bottom: 0;
    width: 100%;
    padding: 0 5%;
  }
}
.btns {
  display: flex;
  justify-content: flex-end;
}
</style>
